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Scanner Master Books Understanding Trunking
At Scanner Masters, we’re more than a retailer – we are also an online resource for the police and emergency services scanner community.

If you’re looking for information on police scanner codes, police scanner frequencies, scanner codes, scanner frequencies, police radio frequencies or other information, use this section as your guide.

Keep in mind that we’re always happy to talk, chat or email with you about your specialized problems. The world of police and emergency responder scanning is as vast as the U.S. and Canada, so visit this page frequently for the latest updates of concern to our scanning community.


The best national resource for frequency information is found at www.radioreference.com. Just create a user name and password for free (although donations are welcome) and then go to the “Database” and then “Database Home” for all the information you could ever want on frequencies and trunking talk groups for your area or any area in the nation.

Frequencies, communications systems and more!

If you’re looking for frequencies and trying to understand the many communication systems in your area, you’re come to the right place. Let’s cover some of the basics. There are three types’ communication systems:

Analog conventional
Trunking
Digital

So that means we have three levels of scanners:
1. Analog Conventional
2. Analog trunking
3. Digital (scanner cover all three types of systems)

The type of scanner needed is determine by the communications systems in use in your area.
Let’s start off with understanding the three types.

What is an Analog Conventional Scanner?
These scanners are great for monitoring basic analog “FM” police and fire systems and usually AM Commercial aviation.
Analog conventional scanners do not pick up trunking, digital, 700 or 800 MHz systems.

Basic scanner can also pick up:
Amateur Radio
Marine
Railroad
Air (Excluding Military Air)
FRS/ GMRS
Racing

What is an Analog Trunking Scanner?
These scanners are non digital that pick up both analog conventional and analog trunking scanning them at the same time.

Trunking is a system which multiple agencies are sharing the same system. One individual department conversation jump from one frequency to another. Conversations of individual group/department can be followed by programming a talk group. Most system there is one frequency called a Control Channel, this channel sounds like a buzz-saw if monitored conventional. The Control Channel is the brain of the system, assigning each user on the system a frequency when transmitting.

Here is Example using Portland, ME Motorola Type II Trunking system, let’s break down steps of programming a trunking system:

Step 1 – First you need to determine the type of trunking system.

LTR
EDACS
Motorola System I/II
(This system is Motorola System II)

Step 2 – You would then enter the group of frequencies of the nearest transmitter site in your area.

Site 1 - Portland - 866.06250, 866.28750, 866.31250, 866.53750, 866.56250, 866.78750, 867.28750c, 867.78750c, 868.28750c, 868.78750c
Site 2 - Scarborough - 855.98750, 856.26250, 856.46250, 857.21250, 857.46250, 857.73750, 858.21250, 858.46250

The “C” indicates it a control channel

(If you’re in downtown Portland you would pick site 1)


Step 3 - The final step is programming the talk-groups you wish to monitor.

Talk Group User
48 Police Dispatch
80 Police Car to Car
1648 Fire Dispatch
1744 Fire Operations 2

Programming a trunking system can be made this simple by getting the optional ARC (Advice Radio Control) software. This software looks very much like a spreadsheet. You can enter the data into the appropriate fields. The other option is to leave the programming to us with our HomeTown Programming Service.

P25_logo.jpgWhat is a digital “Project 25” (P25) Scanner?
This type of scanner can pick up analog/digital conventional communications and analog/digital trunking. Digital communications are transmitted in ones and zeros like computer binary code, or like Digital TV. Digital scanners decode both a digital signal and receive analog signal. Digital scanner cannot pick up encrypted communications, or cell phone calls. It’s not possible or lawful. Click here to see our full line of Digital Scanners.

There are a few systems that cannot be monitor:
Open Sky, EDACS ProVoice, and European Tetra or any type of encryption.

Did you buy the right scanner?
If you already bought scanner, and you are not sure if you have the right one, don’t worry! You can check by simply visiting our sister website policescanners.net. This website will tell you what types of communication systems are in use in your area. Plus give you the recommended scanners for that area too. All so you can find great links to online frequency databases covering your local area.

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New York Metro/ Northern New Jersey Guide - 7th Edition
New York Metro/ Northern New Jersey Guide - 7th Edition
Our Price: $38.95
Sale Price: $8.95
You Save: $30.00


Over 700 pages of information on police, fire, EMS, local government, transit, sports, and much more. The book includes a huge federal government section. Filled with not only frequencies, but PL/DPL tones, channelization information, unit designators, radio codes and so much more. The ultimate guide to the most radio-rich region of the nation.


Product Code: 01-510817
Phoenix/Tucson Metro Directory
Phoenix/Tucson Metro Directory
Our Price: $19.95

A compact excerpt from the larger Southwest Frequency Directory. This 215 page 4.25" by 7" book will enhance radio monitoring by providing the most important aspects of its larger counterpart, in a smaller package covering Maricopa (Phoenix), Pima (Tucson) and Pinal counties. Keep one in your car for quick reference!

Product Code: 26-511128
Racing Frequencies Online
Racing Frequencies Online - 1 Year Subscription
Our Price: $25.00
Discontinued

Racing Frequencies Online

Receive access to printed frequency lists and data downloads (which may be downloaded directly into selected scanners) by the next business day after your order.

Product Code: 02-600680
RadioReference (Large) County Communications Directory
RadioReference (Large) County Communications Directory
Our Price: $39.95

For Los Angeles County, California; Cook County (Chicago and environs), Illinois; or the 5 Boros of New York City (specify one of these regions in the notes section of your order). For other areas of the country please see the Medium or the Small directory.

Product Code: 01-511299
RadioReference (Medium) County Communications Directory
RadioReference (Medium) County Communications Directory
Our Price: $19.95

For the major city/county areas of the nation other than New York City, Los Angeles and Chicago (for those areas please refer to the Large County directory). These city/county areas includes (city proper): Boston, Philadelphia, DC, Pittsburgh, Tampa, Ft. Lauderdale, Miami, Houston, Dallas, Ft. Worth, Kansas City, St. Louis, Cincinnati, Columbus, Denver, Salt Lake City, Seattle, San Francisco, San Diego, and similar-sized cities. For other areas of the country please see the Small directory. If you are not sure which area your city/county falls into please send an e-mail to support@scannermaster.com.

Product Code: 01-511298
RadioReference (Small) County Communications Directory
RadioReference (Small) County Communications Directory
Our Price: $9.95

For all counties in the U.S. except the top 25 largest city/county areas of the nation. For these larger regions please see the Medium and Large Directories. If you are not sure which directory your area falls into please send an e-mail to support@scannermaster.com.

Product Code: 01-511297
Scanner Master Massachusetts, Rhode Island & Southern New Hampshire Pocket Guide 11th Edition
Scanner Master Massachusetts, Rhode Island & Southern New Hampshire Pocket Guide 11th Edition
Our Price: $24.95
Sale Price: $6.95
You Save: $18.00

Thousands of new listings, critical police and fire frequency changes, hundreds of sub-audible tone/PL updates, new channel usage data, and much more.

Product Code: 01-511320
Southern California Frequency Directory
Southern California Frequency Directory
Our Price: $24.95
OUT OF STOCK

The premier Southern California scanner resource, now in its third edition. SCFD3 is the largest and most complete directory for Southern California at 536 pages! The book is organized by county (including 10 Southern California counties) for easy use and is packed full of information written and edited by local scanner experts!

Product Code: 26-511126
Southwest Frequency Directory
Southwest Frequency Directory
Our Price: $29.95

SWFD-10 is the most up to date scanner information resource for Arizona. The 240 page 8.5" by 11" directory is organized by county (including all 15 Arizona counties) for easy use and is packed full of information written and edited by local scanner experts!

Product Code: 26-511127
   
 
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